Android 8.1 preview available for Nexus, Pixel devices

Google has rolled out preview version of Android 8.1 to its Nexus & Pixel users, As per Google Devs

This update to Android Oreo includes a set of targeted enhancements including optimizations for Android Go (for devices with 1GB or less of memory) and a new Neural Networks API to accelerate on-device machine intelligence. We’ve also included a few smaller enhancements to Oreo in response to user and developer feedback.